Our 3 Red Star chicks (4 weeks old today) have been on Sulmet for 4 days because of bloody poo. This morning 2 of the 3 are sneezing. Is this a secondary infection? Do I need another medication? They are drinking/eating not as much as they did before getting sick, but they are still doing it. Every couple of hours, I go in and clean up poop droppings, refresh water, and encourage them to eat their chick start/grow. Yesterday, one of them was overheating itself under heat lamp, I think. It was laying directly under it, panting, with wing sprawled out. It seemed to do that every 15 minutes or so. Go lay down for 5 minutes. Today, it is not doing that so far, but it is sneezing. Thank you for any help. These are our first chicks and they are part of our family.